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BERNARD SCHAEFER, OF CHICAGO, ILLINOIS. Letters Patent No. 60,795, dated January 1, 1867.

IMPROVEMENT IN BOILER-FLUE CLEANERS.

TO ALL WHOM IT MAY CONCERN:

Be it known that I, BERNARD SCHAEFER, of the cty.of Chicago, in the county of Cook, and State of Illinois, have invented a new and useful device in Flue Gleaner," to clean the ilues of boilers; and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawing, making@l part of this specification.

The object Iof my invention consists in producing a device by means of which the il-ues of boilers can be cleaned readily and conveniently. v

To enable others skilled in the art to make and use my invention, I will proceed to describe its construction and operation.

My device consists of two or three springs, AA, to and at the end of each of which semicircular disks, B B, are welded. A plate, C, is riveted to one of said disks for the purpose of closing the space between the disks. Two or three projections, D D, constituting a nose of the device, are riveted to the disks for the purpose of facilitating the introduction of the device into a iiue. The springs A A are welded together at E, forming a. nut with a thread cut inside, into which an iron rod, F, having a. screw-thread cut at its end, is screwed and is used as a. handle. The size of the disks is such as to allow not less than one-eighthA of an inch of play between them when the device is used .to clean the smallest luest p My drawing represents a two-spring cleaner, in which case the disks will abut to theinterior sides of the ilue at two points only; but when the cleaner consists of three springs, the disks form a kind of star, and abut to the in'side walls of a lue all/around.

The operation consists in introducing the cleaner into a. iiue, and by drawing it one way and the other to clean it from ashes and cinders.

What I claim as my invention, and desire to secure by Letters Patent, is-

The construction and arrangement of the springs AA. with the disks B B, plate C, and guides D D, as herein described and for the purpose set forth.

BERNARD SCHAEFER.

Witnesses:

J. B. Tcncnm, J. R. Humm. 

